I have both, but far prefer the PS3. It isn't anywhere near as noisy, the game lineup actually seems better to me (I own a handful of 360 games, and struggle to find anything I'm interested in, whereas I have over 30 PS3 titles on the shelf plus a bunch of PSN downloads).
I also think the PS3 is far better designed. I replaced the 60GB HDD with a 320GB model in about ten minutes - yet to upgrade the 20GB 360 drive is going to cost me nearly £100 (ie: the cost of a 2TB drive) to get 120GB. Stupid Microsoft ripoffs. The WiFi is built in (yep, spent £55 on the adapter for the 360) and the XMB is far far superior to the horrible mess of the Dashboard.
I also think the PS3 is far better designed. I replaced the 60GB HDD with a 320GB model in about ten minutes - yet to upgrade the 20GB 360 drive is going to cost me nearly £100 (ie: the cost of a 2TB drive) to get 120GB. Stupid Microsoft ripoffs. The WiFi is built in (yep, spent £55 on the adapter for the 360) and the XMB is far far superior to the horrible mess of the Dashboard.